AttributeSchema Dataype or EnumerationUsageDefinitionBusiness Rules
OIDoidRequiredUnique identifier for the Codelist element.The OID attribute value must be unique within the Study/MetaDataVersion.
NamenameRequiredHuman readable name for the Codelist.The Name attribute must be unique within the set of CodeList elements within a Study/MetadataVersion.
DataType(integer | decimal | text | string )RequiredSpecifies the DataType for codes defined in this codelist.

The DataType restricts the values that can appear in the CodeList whether internal or external.

CommentOIDoidrefOptionalReference to a CommentDef Element.The CommentOID must match the OID for a CommentDef in this Study/MetaDataVersion.
StandardOIDoidrefOptionalReference to a Standard element.Must match the OID attribute of a Standard element within this Study/MetaDataVersion/Standards.
IsNonStandard(Yes)ConditionalUsed when the controlled terminology includes a set of EnumeratedItem or CodeListItem elements as defined by the sponsor.
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